2. Academic Validation
  3. Autoacetylation of NAT10 is critical for its function in rRNA transcription activation

Autoacetylation of NAT10 is critical for its function in rRNA transcription activation

  • Biochem Biophys Res Commun. 2017 Jan 29;483(1):624-629. doi: 10.1016/j.bbrc.2016.12.092.
Shiying Cai 1,  Xiaofeng Liu 1,  Chunfeng Zhang 2,  Baocai Xing 3,  Xiaojuan Du 4
Affiliations

Affiliations

  • 1 Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.
  • 2 Department of Medical Genetics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.
  • 3 Hepatopancreatobiliary Surgery Department I, Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, Peking University School of Oncology, Beijing Cancer Hospital and Institute, No. 52, Fu-Cheng Road, Beijing 100142, China.
  • 4 Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China. Electronic address: [email protected].
PMID: 27993683 DOI: 10.1016/j.bbrc.2016.12.092
Abstract

NAT10, an important member of GNAT family, harbors Histone Acetyltransferase and participates in many cellular processes such as ribosome production and cell cycle. Here, we report that NAT10 is acetylated in vivo and autoacetylated in vitro. The lysine residue at 426 (K426) is the acetylation site of NAT10. K426R mutant of NAT10 fails to activate rRNA transcription. NAT10 K426R loses its capability of acetylating UBF though it still binds UBF, which fails to recruit PAF53 and RNA polymerase I to rDNA, eventually resulting in inhibition of pre-rRNA transcription. Therefore, acetylation of K426 in NAT10 is required for its function in activating rRNA transcription. These findings identify a new post-translational modification on NAT10 which regulates its function.

Keywords

Acetylation; Autoacetylation; UBF; rRNA transcription.

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